Dewatering attachment for concentrating tables



April 20 1926. 1,582,020

E. J. OCONNELL} DEWATERING ATTACHMENT FOR CONGENTRATING TABLES Filed April 20. 1921 Patented Apr. 20, 1926.

UNITED I I 1.532.920 PATENT caries. i

EDWARD J. OCONNELL, F Fon rwAYnn, INDIANA; ELW'IN M. Home ADMINIS- TnAToR or sari). EnwAnn a, QQQNNELL, nnonasnn.

DEWATERING ATTACHMENT roe ooivoniv'rnarr ve TABLES.

Application filed April 20, 1821. Serial No. 452,974.

. To (LZZ who-m itmay concern: 9

Be it known. that I, ED ARD J. OC N- NELL, a citizen of the United States of; America, and resident of- Fort \Vayne, in the county of Allen and-State ofIndiana, have invented certain. new and useful: Improvements in Dewatering Attachments for Con,-

centrating Tables, of-whichthe following is I a specification. c M

This invention relates to improvements in dewatering 'atuiehments for concentrating tables, and theobj ect thereof isto provide a device adapted tofbe attached to and operated in conjunction with a reciprocating table, by means of whichwater used in washing coal on the table will be delivered from the concentrator separately from the coal;

necessitates subsequent treatment in order that the coal may be relieved of the water so as to render it marketable. It is also very desirable that the very. fine particles of coal, as well as the water, be eliminated from the coarser grades. As such operations are ordinarily carried out by additional machinery with attendant complication of operations, the present invention affords an advantage in that the coal is discharged from the washing apparatus in a state practically freed from moisture and the extreme fine particles. These objects are accomplished'by the construction illustrated in the accompanying drawings in which: I

Fig. l is a plan View of. a concentrating table and the invention applied thereto;

Fig. 2 is a side elevation projected from Fig. 1; and

Fig. 3 is an end elevation of the table and the attachment.

Similar characters of reference indicate corresponding parts throughout the several views and referring now to the same:

1 is a concentrating table deck of the usual type including a frame 2 upon which the deck proper is built, the surface of the deck;

having thereon a series of riflles 3. Also," a

feed box 4 and dressing water, distributinglaunders are arranged in the usual manner along the-feed side G-of thedeck. The sup.- port for the deck and the mechanism for imparting longitudinal reciprocating movement thereto. are not herein. shown, as they may be of any suitable construction, and form no part; of the present invention.

The deck herein shown. as an example of the type to which the invention is applicable is operated as usual, coal and water being introduced intothe feed box 4 from which it passes onto the. declnfand dressing water being applied along thefeed sideof the deck from the launders 5, the deck being slanted transversely so that the coal and water gravitally pass acrossthe table to the discharge side 7. The particles, of slate, stoneand other substances heavier than coal, that tend to lag upon the surface of thedeck, become progressed in the usual manner to theconcentrates discharge end 8 of the deck.

The present invention comprises the construction and arrangement of a dewatering device in conjunction with the deck at the discharge side thereof and by which the coal and water passing from the discharge side of the deck are conveyed therefrom and separately discharged.

The device is comprised of a launder 9 that is secured along one side thereof to a supporting beam 10 which is rigidly fixed to the frame 2 of the deck and extends from one end thereof to theother. Also, the launder 9 is supported along its opposite side bybrackets 11 that are secured'to the frame. The launder is positioned partially under the discharge side of the table and so as to have a downward slant toward the concentrates discharge end of the deck in order that material that passes into it from the side of the deck will tend to flow toward the open front end.

A feature of the invention consists of a screen 12 that forms part of the bottom of the launder 9- adjacent its open or discharge end, through which the water passes and becomes separated from the coal th'at'passes over the screen and is discharged from the open end of the launder. The screen 12 is bent slightly at a point along the linem,

its rear portion having approximately the same declivity as the bottom 18 ofthe launder proper, and the portion adjacent the fdischarge end of the launder being more nearly level than theother portion.

In the ope 'ation of the invention the table is reciprocated longitudinally and operated in the usual manner, the coal and water pass ing' across the rifi'led area on the table from which it is discharged into the launder 9, and the heavy refuse or concentrates being moved forwardly by the iinpellent motion of the table to the discharge end 8. The dressing water applied to the table from the distributing launders flows trai'isvcrsely across the table washing the coal from the heavier refuse during its passage to the launder 9. Movement is imparted to the launder 9 because of its rigid connection with the table, and its action therefore tends to move the coalforwardly to the discharge end; As the coal passes down the launder over the screen, the water and the very fine particles of coal pass through the screen and are thus separated from the coal that passes overthe screen. The forward portion of the screen, being of less declivitv than the bottom 13 of the launder 9, causes the coal to lag somewhat in its passage over the screen, thus the separation of the water from the coal is facilitated.

By positioning" the launder 9 so as to extend partly under the side of the table the occupied space of the concentrating apparatus as a whole is material]; conserved.

\Vhat I claim is:-

In combination with a concentrating table having longitudinal reciprocating movement, a launder in fixed relation with the table and movable longitudinally therewith located under the tailings discharge side thereof, there being a screen forming; the bottom of vthe discharge end portion of the launder, said screen extending in contiguous longitudinal planes, the innermost portion of said screen extending in the general plane of the bottom of the launder and the other portion extending therefrom 'ith less declivit-y than the former portion.

In testimony whereof I a'lfix mv signature.

EDWARD J. OGONN'ELL. 

